For more than 50 years, Milwaukee Valve has manufactured and sold valves for use on United States Navy ships. Every one of Milwaukee Valve’s marine valves is designed and built in the United States, and are installed on every U.S. Navy ship, from DDG destroyers to massive CVN Ford-class aircraft carriers. The unique skills Milwaukee Valve provides to meet the demands of its U.S. Navy customers are the same skills provided to our commercial and industrial customers, the company explains. Milwaukee Valve.